ARM: dts: msm: enable only single flash on MSM8953/8917 QRD

MSM8953/8917 QRD support only single flash - flash_0/torch_0.
Hence, remove the DT entries for second flash - flash_1, torch_1.

CRs-Fixed: 975075
Change-Id: Id2542aa5dd73add567883e95644566755500db30
Signed-off-by: Mao Li <maol@codeaurora.org>